The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 24, 2004
Filed:
Sep. 23, 2002
Thoai-Thai Le, Cary, NC (US);
Torsten Partsch, Chapel Hill, NC (US);
Infineon Technologies AG, Munich, DE;
Abstract
A delay locked loop (DLL) for use in a semiconductor device includes a phase detector that receives a reference clock signal and a feedback clock signal and provides a delay control signal to a latch. The latch provides a latched delay control signal to a delay circuit. The delay circuit receives the reference clock signal in addition to the latched delay control signal, and provides a delayed clock signal. An off chip driver (OCD) receives the delayed clock signal and provides an interim feedback clock signal to a receiver. The receiver provides the feedback clock signal to the phase detector, thus completing the loop. The DLL may also include a means for receiving and responding to an update command, wherein the update command causes loop to open, and the latch to store the delay control signal.